Table of Contents

Foreword
Committee Roster
Correspondence With the B18 Committee
Summary of Changes
1 Introductory Notes
2 General Data for Machine Screw and Tapping
  Screw Heads
3 General Data for Machine Screws
4 General Data for Tapping Screws
5 General Data for Metallic Drive Screws
Mandatory Appendices
I - Protrusion Gaging of Flat Countersunk Heads
II - Across-Corners Gaging of Hex Heads
III - Gaging of Recessed Heads, Types I, IA, and III
IV - Wobble Gaging of Recessed Heads
V - Dimensions for No. 0000, No. 000, and No. 00
    Thread Sizes
VI - Dimensions of Type C Tapping Screws
VII - Type VI Recess Gage Requirements
Nonmandatory Appendices
A - Dimensions of Header Points for Machine Screws Before
    Threading
B - Determination of Maximum Effective Design Grip Lengths
C - Formulas for Dimensions
D - Approximate Hole Sizes for Tapping Screws
E - Wrench Openings for Hex Head Screws, and Square and Hex
    Nuts

Abstract

Describes the complete general and dimensional data for the various types of slotted and recessed head machine screws, tapping screws, and metallic drive screws recognized as American National Standard.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	American Society of Mechanical Engineers
Pages
ISBN
Supersedes	ASME B18.6.4 : 1998 ASME B18.6.3 : 2010 SAE J 478 : A